/* ==========================================================================
   components.css — Reusable UI Components
   UMPortal — Phase 7 Frontend
   ========================================================================== */

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  line-height: 1.5;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

.btn-danger {
  background: var(--color-danger);
  color: white;
}

.btn-danger:hover {
  background: var(--color-danger-hover);
}

.btn-success {
  background: var(--color-success);
  color: white;
}

.btn-success:hover {
  background: var(--color-success-hover);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn-outline:hover {
  background: var(--color-bg);
}

.btn-sm {
  padding: 6px 12px;
  font-size: var(--font-size-sm);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input.error {
  border-color: var(--color-danger);
}

.form-hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--spacing-xs);
}

/* Input group with icons */
.input-group {
  position: relative;
}

.input-group .form-input {
  padding-left: 40px;
}

.input-group .input-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
  font-size: 18px;
  pointer-events: none;
}

.input-group .input-icon-right {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-secondary);
  font-size: 18px;
}

/* Checkbox + label */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.card-header {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
}

.card-body {
  padding: var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   Tables
   -------------------------------------------------------------------------- */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th {
  text-align: left;
  padding: 12px var(--spacing-md);
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  border-bottom: 2px solid var(--color-border);
  background: var(--color-bg);
}

.table td {
  padding: 12px var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
}

.table-striped tbody tr:nth-child(even) {
  background: var(--color-bg);
}

.table tbody tr:hover {
  background: #f1f5f9;
}

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table-actions {
  display: flex;
  gap: var(--spacing-xs);
}

/* --------------------------------------------------------------------------
   Modals
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: scale(0.9);
  transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--color-text-secondary);
  padding: 4px;
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

/* --------------------------------------------------------------------------
   Badges
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.5;
}

.badge-primary {
  background: #dbeafe;
  color: var(--color-primary);
}

.badge-success {
  background: #dcfce7;
  color: var(--color-success);
}

.badge-danger {
  background: #fee2e2;
  color: var(--color-danger);
}

.badge-warning {
  background: #fef3c7;
  color: var(--color-warning);
}

.badge-secondary {
  background: #f1f5f9;
  color: var(--color-text-secondary);
}

/* --------------------------------------------------------------------------
   Toasts
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--color-text-secondary);
  min-width: 300px;
  animation: slideIn 0.3s ease;
}

.toast-success {
  border-left-color: var(--color-success);
}

.toast-error {
  border-left-color: var(--color-danger);
}

.toast-info {
  border-left-color: var(--color-primary);
}

.toast-message {
  flex: 1;
  font-size: var(--font-size-sm);
}

.toast-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-secondary);
  font-size: 18px;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* --------------------------------------------------------------------------
   Toggle Switches
   -------------------------------------------------------------------------- */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-border);
  border-radius: 24px;
  transition: var(--transition-fast);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: var(--transition-fast);
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--color-primary);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

/* --------------------------------------------------------------------------
   Pagination
   -------------------------------------------------------------------------- */
.pagination {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  justify-content: center;
  margin-top: var(--spacing-lg);
}

.page-btn {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.page-btn:hover {
  background: var(--color-bg);
}

.page-btn.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.page-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.page-info {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0 var(--spacing-sm);
}

/* --------------------------------------------------------------------------
   Loading Spinner
   -------------------------------------------------------------------------- */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner-lg {
  width: 40px;
  height: 40px;
  border-width: 3px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* --------------------------------------------------------------------------
   Alerts
   -------------------------------------------------------------------------- */
.alert {
  padding: 12px var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.alert-danger {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.alert-success {
  background: #dcfce7;
  color: #166534;
  border: 1px solid #bbf7d0;
}

.alert-info {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid #bfdbfe;
}

/* --------------------------------------------------------------------------
   Search Input
   -------------------------------------------------------------------------- */
.search-wrapper {
  position: relative;
  display: inline-block;
}

.search-input {
  padding: 10px 12px 10px 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-sm);
  width: 100%;
  max-width: 400px;
  outline: none;
  transition: border-color var(--transition-fast);
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-wrapper .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
}

/* --------------------------------------------------------------------------
   Footer Separator (used on login page footer)
   -------------------------------------------------------------------------- */
.footer-separator {
   margin: 0 6px;
   opacity: 0.5;
}